title: Prevalence of constipation: agreement among several criteria and evaluation of the diagnostic accuracy of qualifying symptoms and self-reported definition in a population-based survey in Spain.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003248:Constipation / Q000175:diagnosis* / Q000453:epidemiology* / Q000209:etiology; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D015995:Prevalence; D012307:Risk Factors; D012737:Sex Factors; D013030:Spain / Q000453:epidemiology; D011795:Surveys and Questionnaires / Q000592:standards*